PLATFORM = $(platform-y)
export PLATFORM
-CFLAGS += -pipe -mlongcalls
+# temporarily until string.h is fixed
+cflags-y += -ffreestanding
+
+cflags-y += -pipe -mlongcalls
+
+CFLAGS += $(cflags-y)
KBUILD_DEFCONFIG := iss_defconfig
obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o semaphore.o \
setup.o signal.o syscall.o time.o traps.o vectors.o platform.o \
- pci-dma.o
+ pci-dma.o init_task.o io.o
## windowspill.o
#include <linux/stddef.h>
#include <linux/thread_info.h>
#include <linux/ptrace.h>
+#include <linux/mm.h>
+
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#define DEFINE(sym, val) asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-#define BLANK() asm volatile("\n->" : : )
int main(void)
{
DEFINE(PT_SIZE, sizeof(struct pt_regs));
DEFINE(PT_AREG_END, offsetof (struct pt_regs, areg[XCHAL_NUM_AREGS]));
DEFINE(PT_USER_SIZE, offsetof(struct pt_regs, areg[XCHAL_NUM_AREGS]));
- BLANK();
/* struct task_struct */
DEFINE(TASK_PTRACE, offsetof (struct task_struct, ptrace));
DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, stack));
DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
- BLANK();
/* struct thread_info (offset from start_struct) */
DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra));
DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
DEFINE(THREAD_CP_SAVE, offsetof (struct task_struct, thread.cp_save));
DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, thread.current_ds));
- BLANK();
/* struct mm_struct */
DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));
DEFINE(MM_PGD, offsetof (struct mm_struct, pgd));
DEFINE(MM_CONTEXT, offsetof (struct mm_struct, context));
- BLANK();
- DEFINE(PT_SINGLESTEP_BIT, PT_SINGLESTEP_BIT);
+
+ /* struct page */
+ DEFINE(PAGE_FLAGS, offsetof(struct page, flags));
/* constants */
DEFINE(_CLONE_VM, CLONE_VM);
DEFINE(_CLONE_UNTRACED, CLONE_UNTRACED);
+ DEFINE(PG_ARCH_1, PG_arch_1);
return 0;
}
-
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2005 by Tensilica Inc.
+ * Copyright (C) 2004-2007 by Tensilica Inc.
*
* Chris Zankel <chris@zankel.net>
*
* We have to save all registers up to the first '1' from
* the right, except the current frame (bit 0).
* Assume a2 is: 001001000110001
- * All regiser frames starting from the top fiel to the marked '1'
+ * All register frames starting from the top field to the marked '1'
* must be saved.
*/
l32i a0, a1, TASK_MM # tsk->mm
beqz a0, 9f
-8: rsr a1, EXCVADDR # fault address
- _PGD_OFFSET(a0, a1, a1)
+
+ /* We deliberately destroy a3 that holds the exception table. */
+
+8: rsr a3, EXCVADDR # fault address
+ _PGD_OFFSET(a0, a3, a1)
l32i a0, a0, 0 # read pmdval
- //beqi a0, _PAGE_USER, 2f
beqz a0, 2f
/* Read ptevaddr and convert to top of page-table page.
* The messy computation for 'pteval' above really simplifies
* into the following:
*
- * pteval = ((pmdval - PAGE_OFFSET) & PAGE_MASK) | PAGE_KERNEL
+ * pteval = ((pmdval - PAGE_OFFSET) & PAGE_MASK) | PAGE_DIRECTORY
*/
movi a1, -PAGE_OFFSET
extui a1, a0, 0, PAGE_SHIFT # ... & PAGE_MASK
xor a0, a0, a1
-
- movi a1, PAGE_DIRECTORY
+ movi a1, _PAGE_DIRECTORY
or a0, a0, a1 # ... | PAGE_DIRECTORY
+ /*
+ * We utilize all three wired-ways (7-9) to hold pmd translations.
+ * Memory regions are mapped to the DTLBs according to bits 28 and 29.
+ * This allows to map the three most common regions to three different
+ * DTLBs:
+ * 0,1 -> way 7 program (0040.0000) and virtual (c000.0000)
+ * 2 -> way 8 shared libaries (2000.0000)
+ * 3 -> way 0 stack (3000.0000)
+ */
+
+ extui a3, a3, 28, 2 # addr. bit 28 and 29 0,1,2,3
rsr a1, PTEVADDR
+ addx2 a3, a3, a3 # -> 0,3,6,9
srli a1, a1, PAGE_SHIFT
+ extui a3, a3, 2, 2 # -> 0,0,1,2
slli a1, a1, PAGE_SHIFT # ptevaddr & PAGE_MASK
- addi a1, a1, DTLB_WAY_PGD # ... + way_number
+ addi a3, a3, DTLB_WAY_PGD
+ add a1, a1, a3 # ... + way_number
- wdtlb a0, a1
+3: wdtlb a0, a1
dsync
/* Exit critical section. */
+4: movi a3, exc_table # restore a3
movi a0, 0
s32i a0, a3, EXC_TABLE_FIXUP
9: l32i a0, a1, TASK_ACTIVE_MM # unlikely case mm == 0
j 8b
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+2: /* Special case for cache aliasing.
+ * We (should) only get here if a clear_user_page, copy_user_page
+ * or the aliased cache flush functions got preemptively interrupted
+ * by another task. Re-establish temporary mapping to the
+ * TLBTEMP_BASE areas.
+ */
+
+ /* We shouldn't be in a double exception */
+
+ l32i a0, a2, PT_DEPC
+ bgeui a0, VALID_DOUBLE_EXCEPTION_ADDRESS, 2f
+
+ /* Make sure the exception originated in the special functions */
+
+ movi a0, __tlbtemp_mapping_start
+ rsr a3, EPC_1
+ bltu a3, a0, 2f
+ movi a0, __tlbtemp_mapping_end
+ bgeu a3, a0, 2f
+
+ /* Check if excvaddr was in one of the TLBTEMP_BASE areas. */
+
+ movi a3, TLBTEMP_BASE_1
+ rsr a0, EXCVADDR
+ bltu a0, a3, 2f
+
+ addi a1, a0, -(2 << (DCACHE_ALIAS_ORDER + PAGE_SHIFT))
+ bgeu a1, a3, 2f
+
+ /* Check if we have to restore an ITLB mapping. */
+
+ movi a1, __tlbtemp_mapping_itlb
+ rsr a3, EPC_1
+ sub a3, a3, a1
+
+ /* Calculate VPN */
+
+ movi a1, PAGE_MASK
+ and a1, a1, a0
+
+ /* Jump for ITLB entry */
+
+ bgez a3, 1f
+
+ /* We can use up to two TLBTEMP areas, one for src and one for dst. */
+
+ extui a3, a0, PAGE_SHIFT + DCACHE_ALIAS_ORDER, 1
+ add a1, a3, a1
+
+ /* PPN is in a6 for the first TLBTEMP area and in a7 for the second. */
+
+ mov a0, a6
+ movnez a0, a7, a3
+ j 3b
+
+ /* ITLB entry. We only use dst in a6. */
+
+1: witlb a6, a1
+ isync
+ j 4b
+
+
+#endif // DCACHE_WAY_SIZE > PAGE_SIZE
+
+
2: /* Invalid PGD, default exception handling */
+ movi a3, exc_table
rsr a1, DEPC
xsr a3, EXCSAVE_1
s32i a1, a2, PT_AREG2
8: rsr a1, EXCVADDR # fault address
_PGD_OFFSET(a0, a1, a4)
l32i a0, a0, 0
- //beqi a0, _PAGE_USER, 2f # FIXME use _PAGE_INVALID
beqz a0, 2f
+ /* Note that we assume _PAGE_WRITABLE_BIT is only set if pte is valid.*/
+
_PTE_OFFSET(a0, a1, a4)
l32i a4, a0, 0 # read pteval
- movi a1, _PAGE_VALID | _PAGE_RW
- bnall a4, a1, 2f
+ bbci.l a4, _PAGE_WRITABLE_BIT, 2f
- movi a1, _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_WRENABLE
+ movi a1, _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_HW_WRITE
or a4, a4, a1
rsr a1, EXCVADDR
s32i a4, a0, 0
dhwb a0, 0
#endif
pdtlb a0, a1
- beqz a0, 1f
- idtlb a0 // FIXME do we need this?
wdtlb a4, a0
-1:
/* Exit critical section. */
--- /dev/null
+/*
+ * arch/xtensa/kernel/init_task.c
+ *
+ * Xtensa Processor version.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/init_task.h>
+#include <linux/module.h>
+#include <linux/mqueue.h>
+
+#include <asm/uaccess.h>
+
+static struct fs_struct init_fs = INIT_FS;
+static struct files_struct init_files = INIT_FILES;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+struct mm_struct init_mm = INIT_MM(init_mm);
+
+EXPORT_SYMBOL(init_mm);
+
+union thread_union init_thread_union
+ __attribute__((__section__(".data.init_task"))) =
+{ INIT_THREAD_INFO(init_task) };
+
+struct task_struct init_task = INIT_TASK(init_task);
+
+EXPORT_SYMBOL(init_task);
--- /dev/null
+/*
+ * arch/xtensa/io.c
+ *
+ * IO primitives
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Copied from sparc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ *
+ */
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+void outsb(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 1;
+ writeb(*(const char *)src, addr);
+ src += 1;
+ addr += 1;
+ }
+}
+
+void outsw(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 2;
+ writew(*(const short *)src, addr);
+ src += 2;
+ addr += 2;
+ }
+}
+
+void outsl(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 4;
+ writel(*(const long *)src, addr);
+ src += 4;
+ addr += 4;
+ }
+}
+
+void insb(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 1;
+ *(unsigned char *)dst = readb(addr);
+ dst += 1;
+ addr += 1;
+ }
+}
+
+void insw(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 2;
+ *(unsigned short *)dst = readw(addr);
+ dst += 2;
+ addr += 2;
+ }
+}
+
+void insl(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 4;
+ /*
+ * XXX I am sure we are in for an unaligned trap here.
+ */
+ *(unsigned long *)dst = readl(addr);
+ dst += 4;
+ addr += 4;
+ }
+}
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2006 Tensilica Inc.
*
* Chris Zankel <chris@zankel.net>
*
#include <linux/kernel.h>
#include <linux/cache.h>
-LIST_HEAD(module_buf_list);
+#undef DEBUG_RELOCATE
void *module_alloc(unsigned long size)
{
- panic("module_alloc not implemented");
+ if (size == 0)
+ return NULL;
+ return vmalloc(size);
}
void module_free(struct module *mod, void *module_region)
{
- panic("module_free not implemented");
+ vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
}
int module_frob_arch_sections(Elf32_Ehdr *hdr,
Elf32_Shdr *sechdrs,
char *secstrings,
- struct module *me)
+ struct module *mod)
{
- panic("module_frob_arch_sections not implemented");
+ return 0;
+}
+
+static int
+decode_calln_opcode (unsigned char *location)
+{
+#ifdef __XTENSA_EB__
+ return (location[0] & 0xf0) == 0x50;
+#endif
+#ifdef __XTENSA_EL__
+ return (location[0] & 0xf) == 0x5;
+#endif
+}
+
+static int
+decode_l32r_opcode (unsigned char *location)
+{
+#ifdef __XTENSA_EB__
+ return (location[0] & 0xf0) == 0x10;
+#endif
+#ifdef __XTENSA_EL__
+ return (location[0] & 0xf) == 0x1;
+#endif
}
int apply_relocate(Elf32_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
- struct module *module)
+ struct module *mod)
{
- panic ("apply_relocate not implemented");
+ printk(KERN_ERR "module %s: REL RELOCATION unsupported\n",
+ mod->name);
+ return -ENOEXEC;
+
}
int apply_relocate_add(Elf32_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
- struct module *module)
+ struct module *mod)
{
- panic("apply_relocate_add not implemented");
+ unsigned int i;
+ Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+ Elf32_Sym *sym;
+ unsigned char *location;
+ uint32_t value;
+
+#ifdef DEBUG_RELOCATE
+ printk("Applying relocate section %u to %u\n", relsec,
+ sechdrs[relsec].sh_info);
+#endif
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
+ location = (char *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rela[i].r_offset;
+ sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rela[i].r_info);
+ value = sym->st_value + rela[i].r_addend;
+
+ switch (ELF32_R_TYPE(rela[i].r_info)) {
+ case R_XTENSA_NONE:
+ case R_XTENSA_DIFF8:
+ case R_XTENSA_DIFF16:
+ case R_XTENSA_DIFF32:
+ case R_XTENSA_ASM_EXPAND:
+ break;
+
+ case R_XTENSA_32:
+ case R_XTENSA_PLT:
+ *(uint32_t *)location += value;
+ break;
+
+ case R_XTENSA_SLOT0_OP:
+ if (decode_calln_opcode(location)) {
+ value -= ((unsigned long)location & -4) + 4;
+ if ((value & 3) != 0 ||
+ ((value + (1 << 19)) >> 20) != 0) {
+ printk("%s: relocation out of range, "
+ "section %d reloc %d "
+ "sym '%s'\n",
+ mod->name, relsec, i,
+ strtab + sym->st_name);
+ return -ENOEXEC;
+ }
+ value = (signed int)value >> 2;
+#ifdef __XTENSA_EB__
+ location[0] = ((location[0] & ~0x3) |
+ ((value >> 16) & 0x3));
+ location[1] = (value >> 8) & 0xff;
+ location[2] = value & 0xff;
+#endif
+#ifdef __XTENSA_EL__
+ location[0] = ((location[0] & ~0xc0) |
+ ((value << 6) & 0xc0));
+ location[1] = (value >> 2) & 0xff;
+ location[2] = (value >> 10) & 0xff;
+#endif
+ } else if (decode_l32r_opcode(location)) {
+ value -= (((unsigned long)location + 3) & -4);
+ if ((value & 3) != 0 ||
+ (signed int)value >> 18 != -1) {
+ printk("%s: relocation out of range, "
+ "section %d reloc %d "
+ "sym '%s'\n",
+ mod->name, relsec, i,
+ strtab + sym->st_name);
+ return -ENOEXEC;
+ }
+ value = (signed int)value >> 2;
+
+#ifdef __XTENSA_EB__
+ location[1] = (value >> 8) & 0xff;
+ location[2] = value & 0xff;
+#endif
+#ifdef __XTENSA_EL__
+ location[1] = value & 0xff;
+ location[2] = (value >> 8) & 0xff;
+#endif
+ }
+ /* FIXME: Ignore any other opcodes. The Xtensa
+ assembler currently assumes that the linker will
+ always do relaxation and so all PC-relative
+ operands need relocations. (The assembler also
+ writes out the tentative PC-relative values,
+ assuming no link-time relaxation, so it is usually
+ safe to ignore the relocations.) If the
+ assembler's "--no-link-relax" flag can be made to
+ work, and if all kernel modules can be assembled
+ with that flag, then unexpected relocations could
+ be detected here. */
+ break;
+
+ case R_XTENSA_SLOT1_OP:
+ case R_XTENSA_SLOT2_OP:
+ case R_XTENSA_SLOT3_OP:
+ case R_XTENSA_SLOT4_OP:
+ case R_XTENSA_SLOT5_OP:
+ case R_XTENSA_SLOT6_OP:
+ case R_XTENSA_SLOT7_OP:
+ case R_XTENSA_SLOT8_OP:
+ case R_XTENSA_SLOT9_OP:
+ case R_XTENSA_SLOT10_OP:
+ case R_XTENSA_SLOT11_OP:
+ case R_XTENSA_SLOT12_OP:
+ case R_XTENSA_SLOT13_OP:
+ case R_XTENSA_SLOT14_OP:
+ printk("%s: unexpected FLIX relocation: %u\n",
+ mod->name,
+ ELF32_R_TYPE(rela[i].r_info));
+ return -ENOEXEC;
+
+ case R_XTENSA_SLOT0_ALT:
+ case R_XTENSA_SLOT1_ALT:
+ case R_XTENSA_SLOT2_ALT:
+ case R_XTENSA_SLOT3_ALT:
+ case R_XTENSA_SLOT4_ALT:
+ case R_XTENSA_SLOT5_ALT:
+ case R_XTENSA_SLOT6_ALT:
+ case R_XTENSA_SLOT7_ALT:
+ case R_XTENSA_SLOT8_ALT:
+ case R_XTENSA_SLOT9_ALT:
+ case R_XTENSA_SLOT10_ALT:
+ case R_XTENSA_SLOT11_ALT:
+ case R_XTENSA_SLOT12_ALT:
+ case R_XTENSA_SLOT13_ALT:
+ case R_XTENSA_SLOT14_ALT:
+ printk("%s: unexpected ALT relocation: %u\n",
+ mod->name,
+ ELF32_R_TYPE(rela[i].r_info));
+ return -ENOEXEC;
+
+ default:
+ printk("%s: unexpected relocation: %u\n",
+ mod->name,
+ ELF32_R_TYPE(rela[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+ return 0;
}
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
- struct module *me)
+ struct module *mod)
{
- panic ("module_finalize not implemented");
+ return 0;
}
void module_arch_cleanup(struct module *mod)
{
- panic("module_arch_cleanup not implemented");
-}
-
-struct bug_entry *module_find_bug(unsigned long bugaddr)
-{
- panic("module_find_bug not implemented");
}
return ret;
}
-
-/*
- * This probably belongs here rather than ioport.c because
- * we do not want this crud linked into SBus kernels.
- * Also, think for a moment about likes of floppy.c that
- * include architecture specific parts. They may want to redefine ins/outs.
- *
- * We do not use horrible macros here because we want to
- * advance pointer by sizeof(size).
- */
-void outsb(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 1;
- writeb(*(const char *)src, addr);
- src += 1;
- addr += 1;
- }
-}
-
-void outsw(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 2;
- writew(*(const short *)src, addr);
- src += 2;
- addr += 2;
- }
-}
-
-void outsl(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 4;
- writel(*(const long *)src, addr);
- src += 4;
- addr += 4;
- }
-}
-
-void insb(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 1;
- *(unsigned char *)dst = readb(addr);
- dst += 1;
- addr += 1;
- }
-}
-
-void insw(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 2;
- *(unsigned short *)dst = readw(addr);
- dst += 2;
- addr += 2;
- }
-}
-
-void insl(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 4;
- /*
- * XXX I am sure we are in for an unaligned trap here.
- */
- *(unsigned long *)dst = readl(addr);
- dst += 4;
- addr += 4;
- }
-}
-
-
-
extern void ret_from_fork(void);
-static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-struct mm_struct init_mm = INIT_MM(init_mm);
-EXPORT_SYMBOL(init_mm);
-
-union thread_union init_thread_union
- __attribute__((__section__(".data.init_task"))) =
-{ INIT_THREAD_INFO(init_task) };
-
-struct task_struct init_task = INIT_TASK(init_task);
-EXPORT_SYMBOL(init_task);
-
struct task_struct *current_set[NR_CPUS] = {&init_task, };
void (*pm_power_off)(void) = NULL;
return ret;
}
-spinlock_t semaphore_wake_lock;
+DEFINE_SPINLOCK(semaphore_wake_lock);
/*
* Semaphores are implemented using a two-way counter:
return (long)ret;
}
+asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
+{
+ return sys_fadvise64_64(fd, offset, len, advice);
+}
+
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
unsigned long ccount_per_jiffy; /* per 1/HZ */
-unsigned long ccount_nsec; /* nsec per ccount increment */
+unsigned long nsec_per_ccount; /* nsec per ccount increment */
#endif
-unsigned int last_ccount_stamp;
static long last_rtc_update = 0;
+/*
+ * Scheduler clock - returns current tim in nanosec units.
+ */
+
+unsigned long long sched_clock(void)
+{
+ return (unsigned long long)jiffies * (1000000000 / HZ);
+}
+
static irqreturn_t timer_interrupt(int irq, void *dev_id);
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
xtime.tv_nsec = 0;
last_rtc_update = xtime.tv_sec = sec_n;
- last_ccount_stamp = get_ccount();
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
{
time_t wtm_sec, sec = tv->tv_sec;
long wtm_nsec, nsec = tv->tv_nsec;
- unsigned long ccount;
+ unsigned long delta;
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
* wall time. Discover what correction gettimeofday() would have
* made, and then undo it!
*/
- ccount = get_ccount();
- nsec -= (ccount - last_ccount_stamp) * CCOUNT_NSEC;
+
+ delta = CCOUNT_PER_JIFFY;
+ delta += get_ccount() - get_linux_timer();
+ nsec -= delta * NSEC_PER_CCOUNT;
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
void do_gettimeofday(struct timeval *tv)
{
unsigned long flags;
- unsigned long sec, usec, delta, seq;
+ unsigned long volatile sec, usec, delta, seq;
do {
seq = read_seqbegin_irqsave(&xtime_lock, flags);
- delta = get_ccount() - last_ccount_stamp;
sec = xtime.tv_sec;
usec = (xtime.tv_nsec / NSEC_PER_USEC);
+
+ delta = get_linux_timer() - get_ccount();
+
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
- usec += (delta * CCOUNT_NSEC) / NSEC_PER_USEC;
+ usec += (((unsigned long) CCOUNT_PER_JIFFY - delta)
+ * (unsigned long) NSEC_PER_CCOUNT) / NSEC_PER_USEC;
+
for (; usec >= 1000000; sec++, usec -= 1000000)
;
write_seqlock(&xtime_lock);
- last_ccount_stamp = next;
+ do_timer(1); /* Linux handler in kernel/timer.c */
+
+ /* Note that writing CCOMPARE clears the interrupt. */
+
next += CCOUNT_PER_JIFFY;
- do_timer (1); /* Linux handler in kernel/timer.c */
+ set_linux_timer(next);
if (ntp_synced() &&
xtime.tv_sec - last_rtc_update >= 659 &&
write_sequnlock(&xtime_lock);
}
- /* NOTE: writing CCOMPAREn clears the interrupt. */
+ /* Allow platform to do something useful (Wdog). */
- set_linux_timer (next);
+ platform_heartbeat();
/* Make sure we didn't miss any tick... */
if ((signed long)(get_ccount() - next) > 0)
goto again;
- /* Allow platform to do something useful (Wdog). */
-
- platform_heartbeat();
-
return IRQ_HANDLED;
}
void* handler;
} dispatch_init_table_t;
-dispatch_init_table_t __init dispatch_init_table[] = {
+static dispatch_init_table_t __initdata dispatch_init_table[] = {
{ EXCCAUSE_ILLEGAL_INSTRUCTION, 0, do_illegal_instruction},
{ EXCCAUSE_SYSTEM_CALL, KRNL, fast_syscall_kernel },
#define set_handler(idx,handler) (exc_table[idx] = (unsigned long) (handler))
-void trap_init(void)
+void __init trap_init(void)
{
int i;
# removes any old dependencies. DON'T put your own dependencies here
# unless it's something special (ie not a .c file).
#
-# Note 2! The CFLAGS definition is now in the main makefile...
-obj-y := init.o fault.o tlb.o misc.o
-obj-m :=
-obj-n :=
-obj- :=
+obj-y := init.o fault.o tlb.o misc.o cache.o
--- /dev/null
+/*
+ * arch/xtensa/mm/cache.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001-2006 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor
+ * Marc Gauthier
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/bootmem.h>
+#include <linux/swap.h>
+#include <linux/pagemap.h>
+
+#include <asm/pgtable.h>
+#include <asm/bootparam.h>
+#include <asm/mmu_context.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+
+//#define printd(x...) printk(x)
+#define printd(x...) do { } while(0)
+
+/*
+ * Note:
+ * The kernel provides one architecture bit PG_arch_1 in the page flags that
+ * can be used for cache coherency.
+ *
+ * I$-D$ coherency.
+ *
+ * The Xtensa architecture doesn't keep the instruction cache coherent with
+ * the data cache. We use the architecture bit to indicate if the caches
+ * are coherent. The kernel clears this bit whenever a page is added to the
+ * page cache. At that time, the caches might not be in sync. We, therefore,
+ * define this flag as 'clean' if set.
+ *
+ * D-cache aliasing.
+ *
+ * With cache aliasing, we have to always flush the cache when pages are
+ * unmapped (see tlb_start_vma(). So, we use this flag to indicate a dirty
+ * page.
+ *
+ *
+ *
+ */
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+
+/*
+ * Any time the kernel writes to a user page cache page, or it is about to
+ * read from a page cache page this routine is called.
+ *
+ */
+
+void flush_dcache_page(struct page *page)
+{
+ struct address_space *mapping = page_mapping(page);
+
+ /*
+ * If we have a mapping but the page is not mapped to user-space
+ * yet, we simply mark this page dirty and defer flushing the
+ * caches until update_mmu().
+ */
+
+ if (mapping && !mapping_mapped(mapping)) {
+ if (!test_bit(PG_arch_1, &page->flags))
+ set_bit(PG_arch_1, &page->flags);
+ return;
+
+ } else {
+
+ unsigned long phys = page_to_phys(page);
+ unsigned long temp = page->index << PAGE_SHIFT;
+ unsigned long alias = !(DCACHE_ALIAS_EQ(temp, phys));
+ unsigned long virt;
+
+ /*
+ * Flush the page in kernel space and user space.
+ * Note that we can omit that step if aliasing is not
+ * an issue, but we do have to synchronize I$ and D$
+ * if we have a mapping.
+ */
+
+ if (!alias && !mapping)
+ return;
+
+ __flush_invalidate_dcache_page((long)page_address(page));
+
+ virt = TLBTEMP_BASE_1 + (temp & DCACHE_ALIAS_MASK);
+
+ if (alias)
+ __flush_invalidate_dcache_page_alias(virt, phys);
+
+ if (mapping)
+ __invalidate_icache_page_alias(virt, phys);
+ }
+
+ /* There shouldn't be an entry in the cache for this page anymore. */
+}
+
+
+/*
+ * For now, flush the whole cache. FIXME??
+ */
+
+void flush_cache_range(struct vm_area_struct* vma,
+ unsigned long start, unsigned long end)
+{
+ __flush_invalidate_dcache_all();
+ __invalidate_icache_all();
+}
+
+/*
+ * Remove any entry in the cache for this page.
+ *
+ * Note that this function is only called for user pages, so use the
+ * alias versions of the cache flush functions.
+ */
+
+void flush_cache_page(struct vm_area_struct* vma, unsigned long address,
+ unsigned long pfn)
+{
+ /* Note that we have to use the 'alias' address to avoid multi-hit */
+
+ unsigned long phys = page_to_phys(pfn_to_page(pfn));
+ unsigned long virt = TLBTEMP_BASE_1 + (address & DCACHE_ALIAS_MASK);
+
+ __flush_invalidate_dcache_page_alias(virt, phys);
+ __invalidate_icache_page_alias(virt, phys);
+}
+
+#endif
+
+void
+update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t pte)
+{
+ unsigned long pfn = pte_pfn(pte);
+ struct page *page;
+
+ if (!pfn_valid(pfn))
+ return;
+
+ page = pfn_to_page(pfn);
+
+ /* Invalidate old entry in TLBs */
+
+ invalidate_itlb_mapping(addr);
+ invalidate_dtlb_mapping(addr);
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+
+ if (!PageReserved(page) && test_bit(PG_arch_1, &page->flags)) {
+
+ unsigned long vaddr = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK);
+ unsigned long paddr = (unsigned long) page_address(page);
+ unsigned long phys = page_to_phys(page);
+
+ __flush_invalidate_dcache_page(paddr);
+
+ __flush_invalidate_dcache_page_alias(vaddr, phys);
+ __invalidate_icache_page_alias(vaddr, phys);
+
+ clear_bit(PG_arch_1, &page->flags);
+ }
+#else
+ if (!PageReserved(page) && !test_bit(PG_arch_1, &page->flags)
+ && (vma->vm_flags & VM_EXEC) != 0) {
+ unsigned long vaddr = addr & PAGE_MASK;
+ __flush_dcache_page(vaddr);
+ __invalidate_icache_page(vaddr);
+ set_bit(PG_arch_1, &page->flags);
+ }
+#endif
+}
+
+/*
+ * access_process_vm() has called get_user_pages(), which has done a
+ * flush_dcache_page() on the page.
+ */
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+
+void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
+ unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+{
+ unsigned long phys = page_to_phys(page);
+ unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));
+
+ /* Flush and invalidate user page if aliased. */
+
+ if (alias) {
+ unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+ __flush_invalidate_dcache_page_alias(temp, phys);
+ }
+
+ /* Copy data */
+
+ memcpy(dst, src, len);
+
+ /*
+ * Flush and invalidate kernel page if aliased and synchronize
+ * data and instruction caches for executable pages.
+ */
+
+ if (alias) {
+ unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+
+ __flush_invalidate_dcache_range((unsigned long) dst, len);
+ if ((vma->vm_flags & VM_EXEC) != 0) {
+ __invalidate_icache_page_alias(temp, phys);
+ }
+
+ } else if ((vma->vm_flags & VM_EXEC) != 0) {
+ __flush_dcache_range((unsigned long)dst,len);
+ __invalidate_icache_range((unsigned long) dst, len);
+ }
+}
+
+extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
+ unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+{
+ unsigned long phys = page_to_phys(page);
+ unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));
+
+ /*
+ * Flush user page if aliased.
+ * (Note: a simply flush would be sufficient)
+ */
+
+ if (alias) {
+ unsigned long temp = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+ __flush_invalidate_dcache_page_alias(temp, phys);
+ }
+
+ memcpy(dst, src, len);
+}
+
+#endif
unsigned long asid_cache = ASID_USER_FIRST;
void bad_page_fault(struct pt_regs*, unsigned long, int);
+#undef DEBUG_PAGE_FAULT
+
/*
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
exccause == EXCCAUSE_ITLB_MISS ||
exccause == EXCCAUSE_FETCH_CACHE_ATTRIBUTE) ? 1 : 0;
-#if 0
+#ifdef DEBUG_PAGE_FAULT
printk("[%s:%d:%08x:%d:%08x:%s%s]\n", current->comm, current->pid,
address, exccause, regs->pc, is_write? "w":"", is_exec? "x":"");
#endif
/* Are we prepared to handle this kernel fault? */
if ((entry = search_exception_tables(regs->pc)) != NULL) {
-#if 1
+#ifdef DEBUG_PAGE_FAULT
printk(KERN_DEBUG "%s: Exception at pc=%#010lx (%lx)\n",
current->comm, regs->pc, entry->fixup);
#endif
* Kevin Chea
*/
-#include <linux/init.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
#include <linux/bootmem.h>
#include <linux/swap.h>
+#include <linux/mman.h>
+#include <linux/nodemask.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
#include <asm/pgtable.h>
#include <asm/bootparam.h>
#include <asm/mmu_context.h>
#include <asm/tlb.h>
-#include <asm/tlbflush.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
-
-#define DEBUG 0
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-//static DEFINE_SPINLOCK(tlb_lock);
-
-/*
- * This flag is used to indicate that the page was mapped and modified in
- * kernel space, so the cache is probably dirty at that address.
- * If cache aliasing is enabled and the page color mismatches, update_mmu_cache
- * synchronizes the caches if this bit is set.
- */
-
-#define PG_cache_clean PG_arch_1
/* References to section boundaries */
printk("%d free pages\n", free);
}
-/* ------------------------------------------------------------------------- */
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE)
-
-/*
- * With cache aliasing, the page color of the page in kernel space and user
- * space might mismatch. We temporarily map the page to a different virtual
- * address with the same color and clear the page there.
- */
-
-void clear_user_page(void *kaddr, unsigned long vaddr, struct page* page)
-{
-
- /* There shouldn't be any entries for this page. */
-
- __flush_invalidate_dcache_page_phys(__pa(page_address(page)));
-
- if (!PAGE_COLOR_EQ(vaddr, kaddr)) {
- unsigned long v, p;
-
- /* Temporarily map page to DTLB_WAY_DCACHE_ALIAS0. */
-
- spin_lock(&tlb_lock);
-
- p = (unsigned long)pte_val((mk_pte(page,PAGE_KERNEL)));
- kaddr = (void*)PAGE_COLOR_MAP0(vaddr);
- v = (unsigned long)kaddr | DTLB_WAY_DCACHE_ALIAS0;
- __asm__ __volatile__("wdtlb %0,%1; dsync" : :"a" (p), "a" (v));
-
- clear_page(kaddr);
-
- spin_unlock(&tlb_lock);
- } else {
- clear_page(kaddr);
- }
-
- /* We need to make sure that i$ and d$ are coherent. */
-
- clear_bit(PG_cache_clean, &page->flags);
-}
-
-/*
- * With cache aliasing, we have to make sure that the page color of the page
- * in kernel space matches that of the virtual user address before we read
- * the page. If the page color differ, we create a temporary DTLB entry with
- * the corrent page color and use this 'temporary' address as the source.
- * We then use the same approach as in clear_user_page and copy the data
- * to the kernel space and clear the PG_cache_clean bit to synchronize caches
- * later.
- *
- * Note:
- * Instead of using another 'way' for the temporary DTLB entry, we could
- * probably use the same entry that points to the kernel address (after
- * saving the original value and restoring it when we are done).
- */
+struct kmem_cache *pgtable_cache __read_mostly;
-void copy_user_page(void* to, void* from, unsigned long vaddr,
- struct page* to_page)
+static void pgd_ctor(void *addr, struct kmem_cache *cache, unsigned long flags)
{
- /* There shouldn't be any entries for the new page. */
-
- __flush_invalidate_dcache_page_phys(__pa(page_address(to_page)));
-
- spin_lock(&tlb_lock);
-
- if (!PAGE_COLOR_EQ(vaddr, from)) {
- unsigned long v, p, t;
-
- __asm__ __volatile__ ("pdtlb %1,%2; rdtlb1 %0,%1"
- : "=a"(p), "=a"(t) : "a"(from));
- from = (void*)PAGE_COLOR_MAP0(vaddr);
- v = (unsigned long)from | DTLB_WAY_DCACHE_ALIAS0;
- __asm__ __volatile__ ("wdtlb %0,%1; dsync" ::"a" (p), "a" (v));
- }
-
- if (!PAGE_COLOR_EQ(vaddr, to)) {
- unsigned long v, p;
-
- p = (unsigned long)pte_val((mk_pte(to_page,PAGE_KERNEL)));
- to = (void*)PAGE_COLOR_MAP1(vaddr);
- v = (unsigned long)to | DTLB_WAY_DCACHE_ALIAS1;
- __asm__ __volatile__ ("wdtlb %0,%1; dsync" ::"a" (p), "a" (v));
- }
- copy_page(to, from);
-
- spin_unlock(&tlb_lock);
-
- /* We need to make sure that i$ and d$ are coherent. */
-
- clear_bit(PG_cache_clean, &to_page->flags);
-}
-
-
-
-/*
- * Any time the kernel writes to a user page cache page, or it is about to
- * read from a page cache page this routine is called.
- *
- * Note:
- * The kernel currently only provides one architecture bit in the page
- * flags that we use for I$/D$ coherency. Maybe, in future, we can
- * use a sepearte bit for deferred dcache aliasing:
- * If the page is not mapped yet, we only need to set a flag,
- * if mapped, we need to invalidate the page.
- */
-// FIXME: we probably need this for WB caches not only for Page Coloring..
-
-void flush_dcache_page(struct page *page)
-{
- unsigned long addr = __pa(page_address(page));
- struct address_space *mapping = page_mapping(page);
-
- __flush_invalidate_dcache_page_phys(addr);
-
- if (!test_bit(PG_cache_clean, &page->flags))
- return;
-
- /* If this page hasn't been mapped, yet, handle I$/D$ coherency later.*/
-#if 0
- if (mapping && !mapping_mapped(mapping))
- clear_bit(PG_cache_clean, &page->flags);
- else
-#endif
- __invalidate_icache_page_phys(addr);
-}
-
-void flush_cache_range(struct vm_area_struct* vma, unsigned long s,
- unsigned long e)
-{
- __flush_invalidate_cache_all();
-}
-
-void flush_cache_page(struct vm_area_struct* vma, unsigned long address,
- unsigned long pfn)
-{
- struct page *page = pfn_to_page(pfn);
-
- /* Remove any entry for the old mapping. */
-
- if (current->active_mm == vma->vm_mm) {
- unsigned long addr = __pa(page_address(page));
- __flush_invalidate_dcache_page_phys(addr);
- if ((vma->vm_flags & VM_EXEC) != 0)
- __invalidate_icache_page_phys(addr);
- } else {
- BUG();
- }
-}
-
-#endif /* (DCACHE_WAY_SIZE > PAGE_SIZE) */
-
-
-pte_t* pte_alloc_one_kernel (struct mm_struct* mm, unsigned long addr)
-{
- pte_t* pte = (pte_t*)__get_free_pages(GFP_KERNEL|__GFP_REPEAT, 0);
- if (likely(pte)) {
- pte_t* ptep = (pte_t*)(pte_val(*pte) + PAGE_OFFSET);
- int i;
- for (i = 0; i < 1024; i++, ptep++)
- pte_clear(mm, addr, ptep);
- }
- return pte;
-}
-
-struct page* pte_alloc_one(struct mm_struct *mm, unsigned long addr)
-{
- struct page *page;
-
- page = alloc_pages(GFP_KERNEL | __GFP_REPEAT, 0);
-
- if (likely(page)) {
- pte_t* ptep = kmap_atomic(page, KM_USER0);
- int i;
+ pte_t* ptep = (pte_t*)addr;
+ int i;
- for (i = 0; i < 1024; i++, ptep++)
- pte_clear(mm, addr, ptep);
+ for (i = 0; i < 1024; i++, ptep++)
+ pte_clear(NULL, 0, ptep);
- kunmap_atomic(ptep, KM_USER0);
- }
- return page;
}
-
-/*
- * Handle D$/I$ coherency.
- *
- * Note:
- * We only have one architecture bit for the page flags, so we cannot handle
- * cache aliasing, yet.
- */
-
-void
-update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t pte)
+void __init pgtable_cache_init(void)
{
- unsigned long pfn = pte_pfn(pte);
- struct page *page;
- unsigned long vaddr = addr & PAGE_MASK;
-
- if (!pfn_valid(pfn))
- return;
-
- page = pfn_to_page(pfn);
-
- invalidate_itlb_mapping(addr);
- invalidate_dtlb_mapping(addr);
-
- /* We have a new mapping. Use it. */
-
- write_dtlb_entry(pte, dtlb_probe(addr));
-
- /* If the processor can execute from this page, synchronize D$/I$. */
-
- if ((vma->vm_flags & VM_EXEC) != 0) {
-
- write_itlb_entry(pte, itlb_probe(addr));
-
- /* Synchronize caches, if not clean. */
-
- if (!test_and_set_bit(PG_cache_clean, &page->flags)) {
- __flush_dcache_page(vaddr);
- __invalidate_icache_page(vaddr);
- }
- }
+ pgtable_cache = kmem_cache_create("pgd",
+ PAGE_SIZE, PAGE_SIZE,
+ SLAB_HWCACHE_ALIGN,
+ pgd_ctor);
}
-
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
*
* Chris Zankel <chris@zankel.net>
*/
-/* Note: we might want to implement some of the loops as zero-overhead-loops,
- * where applicable and if supported by the processor.
- */
#include <linux/linkage.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/asmmacro.h>
#include <asm/cacheasm.h>
+#include <asm/tlbflush.h>
+
-/* clear_page (page) */
+/*
+ * clear_page and clear_user_page are the same for non-cache-aliased configs.
+ *
+ * clear_page (unsigned long page)
+ * a2
+ */
ENTRY(clear_page)
entry a1, 16
- addi a4, a2, PAGE_SIZE
- movi a3, 0
-1: s32i a3, a2, 0
+ movi a3, 0
+ __loopi a2, a7, PAGE_SIZE, 32
+ s32i a3, a2, 0
s32i a3, a2, 4
s32i a3, a2, 8
s32i a3, a2, 12
s32i a3, a2, 20
s32i a3, a2, 24
s32i a3, a2, 28
- addi a2, a2, 32
- blt a2, a4, 1b
+ __endla a2, a7, 32
retw
/*
+ * copy_page and copy_user_page are the same for non-cache-aliased configs.
+ *
* copy_page (void *to, void *from)
- * a2 a3
+ * a2 a3
*/
ENTRY(copy_page)
entry a1, 16
- addi a4, a2, PAGE_SIZE
-
-1: l32i a5, a3, 0
- l32i a6, a3, 4
- l32i a7, a3, 8
- s32i a5, a2, 0
- s32i a6, a2, 4
- s32i a7, a2, 8
- l32i a5, a3, 12
- l32i a6, a3, 16
- l32i a7, a3, 20
- s32i a5, a2, 12
- s32i a6, a2, 16
- s32i a7, a2, 20
- l32i a5, a3, 24
- l32i a6, a3, 28
- s32i a5, a2, 24
- s32i a6, a2, 28
- addi a2, a2, 32
- addi a3, a3, 32
- blt a2, a4, 1b
+ __loopi a2, a4, PAGE_SIZE, 32
+
+ l32i a8, a3, 0
+ l32i a9, a3, 4
+ s32i a8, a2, 0
+ s32i a9, a2, 4
+
+ l32i a8, a3, 8
+ l32i a9, a3, 12
+ s32i a8, a2, 8
+ s32i a9, a2, 12
+
+ l32i a8, a3, 16
+ l32i a9, a3, 20
+ s32i a8, a2, 16
+ s32i a9, a2, 20
+
+ l32i a8, a3, 24
+ l32i a9, a3, 28
+ s32i a8, a2, 24
+ s32i a9, a2, 28
+
+ addi a2, a2, 32
+ addi a3, a3, 32
+
+ __endl a2, a4
+
+ retw
+
+/*
+ * If we have to deal with cache aliasing, we use temporary memory mappings
+ * to ensure that the source and destination pages have the same color as
+ * the virtual address. We use way 0 and 1 for temporary mappings in such cases.
+ *
+ * The temporary DTLB entries shouldn't be flushed by interrupts, but are
+ * flushed by preemptive task switches. Special code in the
+ * fast_second_level_miss handler re-established the temporary mapping.
+ * It requires that the PPNs for the destination and source addresses are
+ * in a6, and a7, respectively.
+ */
+
+/* TLB miss exceptions are treated special in the following region */
+
+ENTRY(__tlbtemp_mapping_start)
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+/*
+ * clear_user_page (void *addr, unsigned long vaddr, struct page *page)
+ * a2 a3 a4
+ */
+
+ENTRY(clear_user_page)
+ entry a1, 32
+
+ /* Mark page dirty and determine alias. */
+
+ movi a7, (1 << PG_ARCH_1)
+ l32i a5, a4, PAGE_FLAGS
+ xor a6, a2, a3
+ extui a3, a3, PAGE_SHIFT, DCACHE_ALIAS_ORDER
+ extui a6, a6, PAGE_SHIFT, DCACHE_ALIAS_ORDER
+ or a5, a5, a7
+ slli a3, a3, PAGE_SHIFT
+ s32i a5, a4, PAGE_FLAGS
+
+ /* Skip setting up a temporary DTLB if not aliased. */
+
+ beqz a6, 1f
+
+ /* Invalidate kernel page. */
+
+ mov a10, a2
+ call8 __invalidate_dcache_page
+
+ /* Setup a temporary DTLB with the color of the VPN */
+
+ movi a4, -PAGE_OFFSET + (PAGE_KERNEL | _PAGE_HW_WRITE)
+ movi a5, TLBTEMP_BASE_1 # virt
+ add a6, a2, a4 # ppn
+ add a2, a5, a3 # add 'color'
+
+ wdtlb a6, a2
+ dsync
+
+1: movi a3, 0
+ __loopi a2, a7, PAGE_SIZE, 32
+ s32i a3, a2, 0
+ s32i a3, a2, 4
+ s32i a3, a2, 8
+ s32i a3, a2, 12
+ s32i a3, a2, 16
+ s32i a3, a2, 20
+ s32i a3, a2, 24
+ s32i a3, a2, 28
+ __endla a2, a7, 32
+
+ bnez a6, 1f
+ retw
+
+ /* We need to invalidate the temporary idtlb entry, if any. */
+
+1: addi a2, a2, -PAGE_SIZE
+ idtlb a2
+ dsync
+
+ retw
+
+/*
+ * copy_page_user (void *to, void *from, unsigned long vaddr, struct page *page)
+ * a2 a3 a4 a5
+ */
+
+ENTRY(copy_user_page)
+
+ entry a1, 32
+
+ /* Mark page dirty and determine alias for destination. */
+
+ movi a8, (1 << PG_ARCH_1)
+ l32i a9, a5, PAGE_FLAGS
+ xor a6, a2, a4
+ xor a7, a3, a4
+ extui a4, a4, PAGE_SHIFT, DCACHE_ALIAS_ORDER
+ extui a6, a6, PAGE_SHIFT, DCACHE_ALIAS_ORDER
+ extui a7, a7, PAGE_SHIFT, DCACHE_ALIAS_ORDER
+ or a9, a9, a8
+ slli a4, a4, PAGE_SHIFT
+ s32i a9, a5, PAGE_FLAGS
+ movi a5, -PAGE_OFFSET + (PAGE_KERNEL | _PAGE_HW_WRITE)
+
+ beqz a6, 1f
+
+ /* Invalidate dcache */
+
+ mov a10, a2
+ call8 __invalidate_dcache_page
+
+ /* Setup a temporary DTLB with a matching color. */
+
+ movi a8, TLBTEMP_BASE_1 # base
+ add a6, a2, a5 # ppn
+ add a2, a8, a4 # add 'color'
+
+ wdtlb a6, a2
+ dsync
+
+ /* Skip setting up a temporary DTLB for destination if not aliased. */
+
+1: beqz a7, 1f
+
+ /* Setup a temporary DTLB with a matching color. */
+
+ movi a8, TLBTEMP_BASE_2 # base
+ add a7, a3, a5 # ppn
+ add a3, a8, a4
+ addi a8, a3, 1 # way1
+
+ wdtlb a7, a8
+ dsync
+
+1: __loopi a2, a4, PAGE_SIZE, 32
+
+ l32i a8, a3, 0
+ l32i a9, a3, 4
+ s32i a8, a2, 0
+ s32i a9, a2, 4
+
+ l32i a8, a3, 8
+ l32i a9, a3, 12
+ s32i a8, a2, 8
+ s32i a9, a2, 12
+
+ l32i a8, a3, 16
+ l32i a9, a3, 20
+ s32i a8, a2, 16
+ s32i a9, a2, 20
+
+ l32i a8, a3, 24
+ l32i a9, a3, 28
+ s32i a8, a2, 24
+ s32i a9, a2, 28
+
+ addi a2, a2, 32
+ addi a3, a3, 32
+
+ __endl a2, a4
+
+ /* We need to invalidate any temporary mapping! */
+
+ bnez a6, 1f
+ bnez a7, 2f
+ retw
+
+1: addi a2, a2, -PAGE_SIZE
+ idtlb a2
+ dsync
+ bnez a7, 2f
+ retw
+
+2: addi a3, a3, -PAGE_SIZE+1
+ idtlb a3
+ dsync
+
+ retw
+
+#endif
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+/*
+ * void __flush_invalidate_dcache_page_alias (addr, phys)
+ * a2 a3
+ */
+
+ENTRY(__flush_invalidate_dcache_page_alias)
+ entry sp, 16
+
+ movi a7, 0 # required for exception handler
+ addi a6, a3, (PAGE_KERNEL | _PAGE_HW_WRITE)
+ mov a4, a2
+ wdtlb a6, a2
+ dsync
+
+ ___flush_invalidate_dcache_page a2 a3
+
+ idtlb a4
+ dsync
+
+ retw
+
+#endif
+
+ENTRY(__tlbtemp_mapping_itlb)
+
+#if (ICACHE_WAY_SIZE > PAGE_SIZE)
+
+ENTRY(__invalidate_icache_page_alias)
+ entry sp, 16
+
+ addi a6, a3, (PAGE_KERNEL | _PAGE_HW_WRITE)
+ mov a4, a2
+ witlb a6, a2
+ isync
+
+ ___invalidate_icache_page a2 a3
+
+ iitlb a4
+ isync
retw
+#endif
+
+/* End of special treatment in tlb miss exception */
+
+ENTRY(__tlbtemp_mapping_end)
+
/*
* void __invalidate_icache_page(ulong start)
*/
dsync
retw
-
-
/*
* void __invalidate_icache_range(ulong start, ulong size)
*/
___invalidate_dcache_range a2 a3 a4
-
retw
/*
#include <linux/param.h>
#include <linux/serial.h>
#include <linux/serialP.h>
-#include <linux/console.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#ifndef _XTENSA_BUGS_H
#define _XTENSA_BUGS_H
-#include <asm/processor.h>
-
-static void __init check_bugs(void)
-{
-}
+static void check_bugs(void) { }
#endif /* _XTENSA_BUGS_H */
#define DCACHE_WAY_SIZE (XCHAL_DCACHE_SIZE/XCHAL_DCACHE_WAYS)
#define ICACHE_WAY_SIZE (XCHAL_ICACHE_SIZE/XCHAL_ICACHE_WAYS)
+#define DCACHE_WAY_SHIFT (XCHAL_DCACHE_SETWIDTH + XCHAL_DCACHE_LINEWIDTH)
+#define ICACHE_WAY_SHIFT (XCHAL_ICACHE_SETWIDTH + XCHAL_ICACHE_LINEWIDTH)
+
+/* Maximum cache size per way. */
+#if DCACHE_WAY_SIZE >= ICACHE_WAY_SIZE
+# define CACHE_WAY_SIZE DCACHE_WAY_SIZE
+#else
+# define CACHE_WAY_SIZE ICACHE_WAY_SIZE
+#endif
#endif /* _XTENSA_CACHE_H */
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * (C) 2001 - 2006 Tensilica Inc.
+ * (C) 2001 - 2007 Tensilica Inc.
*/
#ifndef _XTENSA_CACHEFLUSH_H
#include <asm/page.h>
/*
- * flush and invalidate data cache, invalidate instruction cache:
- *
- * __flush_invalidate_cache_all()
- * __flush_invalidate_cache_range(from,sze)
+ * Lo-level routines for cache flushing.
*
* invalidate data or instruction cache:
*
* __flush_invalidate_dcache_all()
* __flush_invalidate_dcache_page(adr)
* __flush_invalidate_dcache_range(from,size)
+ *
+ * specials for cache aliasing:
+ *
+ * __flush_invalidate_dcache_page_alias(vaddr,paddr)
+ * __invalidate_icache_page_alias(vaddr,paddr)
*/
-extern void __flush_invalidate_cache_all(void);
-extern void __flush_invalidate_cache_range(unsigned long, unsigned long);
-extern void __flush_invalidate_dcache_all(void);
+extern void __invalidate_dcache_all(void);
extern void __invalidate_icache_all(void);
-
extern void __invalidate_dcache_page(unsigned long);
extern void __invalidate_icache_page(unsigned long);
extern void __invalidate_icache_range(unsigned long, unsigned long);
extern void __invalidate_dcache_range(unsigned long, unsigned long);
+
#if XCHAL_DCACHE_IS_WRITEBACK
+extern void __flush_invalidate_dcache_all(void);
extern void __flush_dcache_page(unsigned long);
+extern void __flush_dcache_range(unsigned long, unsigned long);
extern void __flush_invalidate_dcache_page(unsigned long);
extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
#else
-# define __flush_dcache_page(p) do { } while(0)
-# define __flush_invalidate_dcache_page(p) do { } while(0)
-# define __flush_invalidate_dcache_range(p,s) do { } while(0)
+# define __flush_dcache_range(p,s) do { } while(0)
+# define __flush_dcache_page(p) do { } while(0)
+# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p)
+# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
+#endif
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
+#endif
+#if (ICACHE_WAY_SIZE > PAGE_SIZE)
+extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
#endif
/*
* (see also Documentation/cachetlb.txt)
*/
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
-#define flush_cache_all() __flush_invalidate_cache_all();
-#define flush_cache_mm(mm) __flush_invalidate_cache_all();
-#define flush_cache_dup_mm(mm) __flush_invalidate_cache_all();
+#define flush_cache_all() \
+ do { \
+ __flush_invalidate_dcache_all(); \
+ __invalidate_icache_all(); \
+ } while (0)
-#define flush_cache_vmap(start,end) __flush_invalidate_cache_all();
-#define flush_cache_vunmap(start,end) __flush_invalidate_cache_all();
+#define flush_cache_mm(mm) flush_cache_all()
+#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-extern void flush_dcache_page(struct page*);
+#define flush_cache_vmap(start,end) flush_cache_all()
+#define flush_cache_vunmap(start,end) flush_cache_all()
+extern void flush_dcache_page(struct page*);
extern void flush_cache_range(struct vm_area_struct*, ulong, ulong);
extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned long);
#endif
+/* Ensure consistency between data and instruction cache. */
#define flush_icache_range(start,end) \
- __invalidate_icache_range(start,(end)-(start))
+ do { \
+ __flush_dcache_range(start, (end) - (start)); \
+ __invalidate_icache_range(start,(end) - (start)); \
+ } while (0)
/* This is not required, see Documentation/cachetlb.txt */
-
-#define flush_icache_page(vma,page) do { } while(0)
+#define flush_icache_page(vma,page) do { } while (0)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
- memcpy(dst, src, len)
+extern void copy_to_user_page(struct vm_area_struct*, struct page*,
+ unsigned long, void*, const void*, unsigned long);
+extern void copy_from_user_page(struct vm_area_struct*, struct page*,
+ unsigned long, void*, const void*, unsigned long);
+
+#else
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+ do { \
+ memcpy(dst, src, len); \
+ __flush_dcache_range((unsigned long) dst, len); \
+ __invalidate_icache_range((unsigned long) dst, len); \
+ } while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
-#endif /* __KERNEL__ */
+#endif
+#endif /* __KERNEL__ */
#endif /* _XTENSA_CACHEFLUSH_H */
-
#define EM_XTENSA 94
#define EM_XTENSA_OLD 0xABC7
+/* Xtensa relocations defined by the ABIs */
+
+#define R_XTENSA_NONE 0
+#define R_XTENSA_32 1
+#define R_XTENSA_RTLD 2
+#define R_XTENSA_GLOB_DAT 3
+#define R_XTENSA_JMP_SLOT 4
+#define R_XTENSA_RELATIVE 5
+#define R_XTENSA_PLT 6
+#define R_XTENSA_OP0 8
+#define R_XTENSA_OP1 9
+#define R_XTENSA_OP2 10
+#define R_XTENSA_ASM_EXPAND 11
+#define R_XTENSA_ASM_SIMPLIFY 12
+#define R_XTENSA_GNU_VTINHERIT 15
+#define R_XTENSA_GNU_VTENTRY 16
+#define R_XTENSA_DIFF8 17
+#define R_XTENSA_DIFF16 18
+#define R_XTENSA_DIFF32 19
+#define R_XTENSA_SLOT0_OP 20
+#define R_XTENSA_SLOT1_OP 21
+#define R_XTENSA_SLOT2_OP 22
+#define R_XTENSA_SLOT3_OP 23
+#define R_XTENSA_SLOT4_OP 24
+#define R_XTENSA_SLOT5_OP 25
+#define R_XTENSA_SLOT6_OP 26
+#define R_XTENSA_SLOT7_OP 27
+#define R_XTENSA_SLOT8_OP 28
+#define R_XTENSA_SLOT9_OP 29
+#define R_XTENSA_SLOT10_OP 30
+#define R_XTENSA_SLOT11_OP 31
+#define R_XTENSA_SLOT12_OP 32
+#define R_XTENSA_SLOT13_OP 33
+#define R_XTENSA_SLOT14_OP 34
+#define R_XTENSA_SLOT0_ALT 35
+#define R_XTENSA_SLOT1_ALT 36
+#define R_XTENSA_SLOT2_ALT 37
+#define R_XTENSA_SLOT3_ALT 38
+#define R_XTENSA_SLOT4_ALT 39
+#define R_XTENSA_SLOT5_ALT 40
+#define R_XTENSA_SLOT6_ALT 41
+#define R_XTENSA_SLOT7_ALT 42
+#define R_XTENSA_SLOT8_ALT 43
+#define R_XTENSA_SLOT9_ALT 44
+#define R_XTENSA_SLOT10_ALT 45
+#define R_XTENSA_SLOT11_ALT 46
+#define R_XTENSA_SLOT12_ALT 47
+#define R_XTENSA_SLOT13_ALT 48
+#define R_XTENSA_SLOT14_ALT 49
+
/* ELF register definitions. This is needed for core dump support. */
/*
#ifdef __KERNEL__
#include <asm/byteorder.h>
#include <asm/page.h>
+#include <linux/kernel.h>
#include <linux/types.h>
#define TIOCSBRK _IO('T', 39) /* BSD compatibility */
#define TIOCCBRK _IO('T', 40) /* BSD compatibility */
#define TIOCGSID _IOR('T', 41, pid_t) /* Return the session ID of FD*/
+#define TCGETS2 _IOR('T', 42, struct termios2)
+#define TCSETS2 _IOW('T', 43, struct termios2)
+#define TCSETSW2 _IOW('T', 44, struct termios2)
+#define TCSETSF2 _IOW('T', 45, struct termios2)
#define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
#define TIOCSPTLCK _IOW('T',0x31, int) /* Lock/unlock Pty */
/*
- * linux/include/asm-xtensa/page.h
+ * include/asm-xtensa/page.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version2 as
* published by the Free Software Foundation.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
*/
#ifndef _XTENSA_PAGE_H
#ifdef __KERNEL__
#include <asm/processor.h>
+#include <asm/types.h>
+#include <asm/cache.h>
+
+/*
+ * Fixed TLB translations in the processor.
+ */
#define XCHAL_KSEG_CACHED_VADDR 0xd0000000
#define XCHAL_KSEG_BYPASS_VADDR 0xd8000000
*/
#define PAGE_SHIFT 12
-#define PAGE_SIZE (1 << PAGE_SHIFT)
+#define PAGE_SIZE (__XTENSA_UL_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE - 1) & PAGE_MASK)
#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
-#define MAX_MEM_PFN XCHAL_KSEG_SIZE
-#define PGTABLE_START 0x80000000
+#define MAX_MEM_PFN XCHAL_KSEG_SIZE
+#define PGTABLE_START 0x80000000
+
+/*
+ * Cache aliasing:
+ *
+ * If the cache size for one way is greater than the page size, we have to
+ * deal with cache aliasing. The cache index is wider than the page size:
+ *
+ * | |cache| cache index
+ * | pfn |off| virtual address
+ * |xxxx:X|zzz|
+ * | : | |
+ * | \ / | |
+ * |trans.| |
+ * | / \ | |
+ * |yyyy:Y|zzz| physical address
+ *
+ * When the page number is translated to the physical page address, the lowest
+ * bit(s) (X) that are part of the cache index are also translated (Y).
+ * If this translation changes bit(s) (X), the cache index is also afected,
+ * thus resulting in a different cache line than before.
+ * The kernel does not provide a mechanism to ensure that the page color
+ * (represented by this bit) remains the same when allocated or when pages
+ * are remapped. When user pages are mapped into kernel space, the color of
+ * the page might also change.
+ *
+ * We use the address space VMALLOC_END ... VMALLOC_END + DCACHE_WAY_SIZE * 2
+ * to temporarily map a patch so we can match the color.
+ */
+
+#if DCACHE_WAY_SIZE > PAGE_SIZE
+# define DCACHE_ALIAS_ORDER (DCACHE_WAY_SHIFT - PAGE_SHIFT)
+# define DCACHE_ALIAS_MASK (PAGE_MASK & (DCACHE_WAY_SIZE - 1))
+# define DCACHE_ALIAS(a) (((a) & DCACHE_ALIAS_MASK) >> PAGE_SHIFT)
+# define DCACHE_ALIAS_EQ(a,b) ((((a) ^ (b)) & DCACHE_ALIAS_MASK) == 0)
+#else
+# define DCACHE_ALIAS_ORDER 0
+#endif
+
+#if ICACHE_WAY_SIZE > PAGE_SIZE
+# define ICACHE_ALIAS_ORDER (ICACHE_WAY_SHIFT - PAGE_SHIFT)
+# define ICACHE_ALIAS_MASK (PAGE_MASK & (ICACHE_WAY_SIZE - 1))
+# define ICACHE_ALIAS(a) (((a) & ICACHE_ALIAS_MASK) >> PAGE_SHIFT)
+# define ICACHE_ALIAS_EQ(a,b) ((((a) ^ (b)) & ICACHE_ALIAS_MASK) == 0)
+#else
+# define ICACHE_ALIAS_ORDER 0
+#endif
+
#ifdef __ASSEMBLY__
/*
* Pure 2^n version of get_order
+ * Use 'nsau' instructions if supported by the processor or the generic version.
*/
-static inline int get_order(unsigned long size)
+#if XCHAL_HAVE_NSA
+
+static inline __attribute_const__ int get_order(unsigned long size)
{
- int order;
-#ifndef XCHAL_HAVE_NSU
- unsigned long x1, x2, x4, x8, x16;
-
- size = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- x1 = size & 0xAAAAAAAA;
- x2 = size & 0xCCCCCCCC;
- x4 = size & 0xF0F0F0F0;
- x8 = size & 0xFF00FF00;
- x16 = size & 0xFFFF0000;
- order = x2 ? 2 : 0;
- order += (x16 != 0) * 16;
- order += (x8 != 0) * 8;
- order += (x4 != 0) * 4;
- order += (x1 != 0);
-
- return order;
-#else
- size = (size - 1) >> PAGE_SHIFT;
- asm ("nsau %0, %1" : "=r" (order) : "r" (size));
- return 32 - order;
-#endif
+ int lz;
+ asm ("nsau %0, %1" : "=r" (lz) : "r" ((size - 1) >> PAGE_SHIFT));
+ return 32 - lz;
}
+#else
+
+# include <asm-generic/page.h>
+
+#endif
struct page;
extern void clear_page(void *page);
* some extra work
*/
-#if (DCACHE_WAY_SIZE > PAGE_SIZE)
-void clear_user_page(void *addr, unsigned long vaddr, struct page* page);
-void copy_user_page(void *to,void* from,unsigned long vaddr,struct page* page);
+#if DCACHE_WAY_SIZE > PAGE_SIZE
+extern void clear_user_page(void*, unsigned long, struct page*);
+extern void copy_user_page(void*, void*, unsigned long, struct page*);
#else
-# define clear_user_page(page,vaddr,pg) clear_page(page)
+# define clear_user_page(page, vaddr, pg) clear_page(page)
# define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
#endif
/*
- * linux/include/asm-xtensa/pgalloc.h
+ * include/asm-xtensa/pgalloc.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
- * Copyright (C) 2001-2005 Tensilica Inc.
+ * Copyright (C) 2001-2007 Tensilica Inc.
*/
#ifndef _XTENSA_PGALLOC_H
#ifdef __KERNEL__
-#include <linux/threads.h>
#include <linux/highmem.h>
-#include <asm/processor.h>
-#include <asm/cacheflush.h>
-
-
-/* Cache aliasing:
- *
- * If the cache size for one way is greater than the page size, we have to
- * deal with cache aliasing. The cache index is wider than the page size:
- *
- * |cache |
- * |pgnum |page| virtual address
- * |xxxxxX|zzzz|
- * | | |
- * \ / | |
- * trans.| |
- * / \ | |
- * |yyyyyY|zzzz| physical address
- *
- * When the page number is translated to the physical page address, the lowest
- * bit(s) (X) that are also part of the cache index are also translated (Y).
- * If this translation changes this bit (X), the cache index is also afected,
- * thus resulting in a different cache line than before.
- * The kernel does not provide a mechanism to ensure that the page color
- * (represented by this bit) remains the same when allocated or when pages
- * are remapped. When user pages are mapped into kernel space, the color of
- * the page might also change.
- *
- * We use the address space VMALLOC_END ... VMALLOC_END + DCACHE_WAY_SIZE * 2
- * to temporarily map a patch so we can match the color.
- */
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE)
-# define PAGE_COLOR_MASK (PAGE_MASK & (DCACHE_WAY_SIZE-1))
-# define PAGE_COLOR(a) \
- (((unsigned long)(a)&PAGE_COLOR_MASK) >> PAGE_SHIFT)
-# define PAGE_COLOR_EQ(a,b) \
- ((((unsigned long)(a) ^ (unsigned long)(b)) & PAGE_COLOR_MASK) == 0)
-# define PAGE_COLOR_MAP0(v) \
- (VMALLOC_END + ((unsigned long)(v) & PAGE_COLOR_MASK))
-# define PAGE_COLOR_MAP1(v) \
- (VMALLOC_END + ((unsigned long)(v) & PAGE_COLOR_MASK) + DCACHE_WAY_SIZE)
-#endif
/*
* Allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
*/
-#define pgd_free(pgd) free_page((unsigned long)(pgd))
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+#define pmd_populate_kernel(mm, pmdp, ptep) \
+ (pmd_val(*(pmdp)) = ((unsigned long)ptep))
+#define pmd_populate(mm, pmdp, page) \
+ (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
-static inline void
-pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *pte)
+static inline pgd_t*
+pgd_alloc(struct mm_struct *mm)
{
- pmd_val(*(pmdp)) = (unsigned long)(pte);
- __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (pmdp));
+ return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
}
-static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *page)
+static inline void pgd_free(pgd_t *pgd)
{
- pmd_val(*(pmdp)) = (unsigned long)page_to_virt(page);
- __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (pmdp));
+ free_page((unsigned long)pgd);
}
+/* Use a slab cache for the pte pages (see also sparc64 implementation) */
+extern struct kmem_cache *pgtable_cache;
-#else
-
-# define pmd_populate_kernel(mm, pmdp, pte) \
- (pmd_val(*(pmdp)) = (unsigned long)(pte))
-# define pmd_populate(mm, pmdp, page) \
- (pmd_val(*(pmdp)) = (unsigned long)page_to_virt(page))
-
-#endif
-
-static inline pgd_t*
-pgd_alloc(struct mm_struct *mm)
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+ unsigned long address)
{
- pgd_t *pgd;
-
- pgd = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, PGD_ORDER);
-
- if (likely(pgd != NULL))
- __flush_dcache_page((unsigned long)pgd);
+ return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
+}
- return pgd;
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+ unsigned long addr)
+{
+ return virt_to_page(pte_alloc_one_kernel(mm, addr));
}
-extern pte_t* pte_alloc_one_kernel(struct mm_struct* mm, unsigned long addr);
-extern struct page* pte_alloc_one(struct mm_struct* mm, unsigned long addr);
+static inline void pte_free_kernel(pte_t *pte)
+{
+ kmem_cache_free(pgtable_cache, pte);
+}
-#define pte_free_kernel(pte) free_page((unsigned long)pte)
-#define pte_free(pte) __free_page(pte)
+static inline void pte_free(struct page *page)
+{
+ kmem_cache_free(pgtable_cache, page_address(page));
+}
#endif /* __KERNEL__ */
#endif /* _XTENSA_PGALLOC_H */
/*
- * linux/include/asm-xtensa/pgtable.h
+ * include/asm-xtensa/pgtable.h
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version2 as
+ * it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
*/
#ifndef _XTENSA_PGTABLE_H
/*
* The Xtensa architecture port of Linux has a two-level page table system,
- * i.e. the logical three-level Linux page table layout are folded.
+ * i.e. the logical three-level Linux page table layout is folded.
* Each task has the following memory page tables:
*
* PGD table (page directory), ie. 3rd-level page table:
*
* The individual pages are 4 kB big with special pages for the empty_zero_page.
*/
+
#define PGDIR_SHIFT 22
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
*/
#define PTRS_PER_PTE 1024
#define PTRS_PER_PTE_SHIFT 10
-#define PTRS_PER_PMD 1
#define PTRS_PER_PGD 1024
#define PGD_ORDER 0
-#define PMD_ORDER 0
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
-#define FIRST_USER_ADDRESS 0
+#define FIRST_USER_ADDRESS 0
#define FIRST_USER_PGD_NR (FIRST_USER_ADDRESS >> PGDIR_SHIFT)
-/* virtual memory area. We keep a distance to other memory regions to be
+/*
+ * Virtual memory area. We keep a distance to other memory regions to be
* on the safe side. We also use this area for cache aliasing.
*/
-// FIXME: virtual memory area must be configuration-dependent
-
#define VMALLOC_START 0xC0000000
-#define VMALLOC_END 0xC7FF0000
+#define VMALLOC_END 0xC6FEFFFF
+#define TLBTEMP_BASE_1 0xC6FF0000
+#define TLBTEMP_BASE_2 0xC6FF8000
+#define MODULE_START 0xC7000000
+#define MODULE_END 0xC7FFFFFF
-/* Xtensa Linux config PTE layout (when present):
+/*
+ * Xtensa Linux config PTE layout (when present):
* 31-12: PPN
* 11-6: Software
* 5-4: RING
* See further below for PTE layout for swapped-out pages.
*/
-#define _PAGE_VALID (1<<0) /* hardware: page is accessible */
-#define _PAGE_WRENABLE (1<<1) /* hardware: page is writable */
+#define _PAGE_HW_EXEC (1<<0) /* hardware: page is executable */
+#define _PAGE_HW_WRITE (1<<1) /* hardware: page is writable */
+
+#define _PAGE_FILE (1<<1) /* non-linear mapping, if !present */
+#define _PAGE_PROTNONE (3<<0) /* special case for VM_PROT_NONE */
/* None of these cache modes include MP coherency: */
-#define _PAGE_NO_CACHE (0<<2) /* bypass, non-speculative */
-#if XCHAL_DCACHE_IS_WRITEBACK
-# define _PAGE_WRITEBACK (1<<2) /* write back */
-# define _PAGE_WRITETHRU (2<<2) /* write through */
-#else
-# define _PAGE_WRITEBACK (1<<2) /* assume write through */
-# define _PAGE_WRITETHRU (1<<2)
-#endif
-#define _PAGE_NOALLOC (3<<2) /* don't allocate cache,if not cached */
-#define _CACHE_MASK (3<<2)
+#define _PAGE_CA_BYPASS (0<<2) /* bypass, non-speculative */
+#define _PAGE_CA_WB (1<<2) /* write-back */
+#define _PAGE_CA_WT (2<<2) /* write-through */
+#define _PAGE_CA_MASK (3<<2)
+#define _PAGE_INVALID (3<<2)
#define _PAGE_USER (1<<4) /* user access (ring=1) */
-#define _PAGE_KERNEL (0<<4) /* kernel access (ring=0) */
/* Software */
-#define _PAGE_RW (1<<6) /* software: page writable */
+#define _PAGE_WRITABLE_BIT 6
+#define _PAGE_WRITABLE (1<<6) /* software: page writable */
#define _PAGE_DIRTY (1<<7) /* software: page dirty */
#define _PAGE_ACCESSED (1<<8) /* software: page accessed (read) */
-#define _PAGE_FILE (1<<9) /* nonlinear file mapping*/
-#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _CACHE_MASK | _PAGE_DIRTY)
-#define _PAGE_PRESENT ( _PAGE_VALID | _PAGE_WRITEBACK | _PAGE_ACCESSED)
+/* On older HW revisions, we always have to set bit 0 */
+#if XCHAL_HW_VERSION_MAJOR < 2000
+# define _PAGE_VALID (1<<0)
+#else
+# define _PAGE_VALID 0
+#endif
-#ifdef CONFIG_MMU
+#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _PAGE_PRESENT (_PAGE_VALID | _PAGE_CA_WB | _PAGE_ACCESSED)
-# define PAGE_NONE __pgprot(_PAGE_PRESENT)
-# define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_RW)
-# define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER)
-# define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER)
-# define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_KERNEL | _PAGE_WRENABLE)
-# define PAGE_INVALID __pgprot(_PAGE_USER)
+#ifdef CONFIG_MMU
-# if (DCACHE_WAY_SIZE > PAGE_SIZE)
-# define PAGE_DIRECTORY __pgprot(_PAGE_VALID | _PAGE_ACCESSED | _PAGE_KERNEL)
-# else
-# define PAGE_DIRECTORY __pgprot(_PAGE_PRESENT | _PAGE_KERNEL)
-# endif
+#define PAGE_NONE __pgprot(_PAGE_INVALID | _PAGE_USER | _PAGE_PROTNONE)
+#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER)
+#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_HW_EXEC)
+#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER)
+#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_HW_EXEC)
+#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITABLE)
+#define PAGE_SHARED_EXEC \
+ __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITABLE | _PAGE_HW_EXEC)
+#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_HW_WRITE)
+#define PAGE_KERNEL_EXEC __pgprot(_PAGE_PRESENT|_PAGE_HW_WRITE|_PAGE_HW_EXEC)
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+# define _PAGE_DIRECTORY (_PAGE_VALID | _PAGE_ACCESSED)
+#else
+# define _PAGE_DIRECTORY (_PAGE_VALID | _PAGE_ACCESSED | _PAGE_CA_WB)
+#endif
#else /* no mmu */
* What follows is the closest we can get by reasonable means..
* See linux/mm/mmap.c for protection_map[] array that uses these definitions.
*/
-#define __P000 PAGE_NONE /* private --- */
-#define __P001 PAGE_READONLY /* private --r */
-#define __P010 PAGE_COPY /* private -w- */
-#define __P011 PAGE_COPY /* private -wr */
-#define __P100 PAGE_READONLY /* private x-- */
-#define __P101 PAGE_READONLY /* private x-r */
-#define __P110 PAGE_COPY /* private xw- */
-#define __P111 PAGE_COPY /* private xwr */
-
-#define __S000 PAGE_NONE /* shared --- */
-#define __S001 PAGE_READONLY /* shared --r */
-#define __S010 PAGE_SHARED /* shared -w- */
-#define __S011 PAGE_SHARED /* shared -wr */
-#define __S100 PAGE_READONLY /* shared x-- */
-#define __S101 PAGE_READONLY /* shared x-r */
-#define __S110 PAGE_SHARED /* shared xw- */
-#define __S111 PAGE_SHARED /* shared xwr */
+#define __P000 PAGE_NONE /* private --- */
+#define __P001 PAGE_READONLY /* private --r */
+#define __P010 PAGE_COPY /* private -w- */
+#define __P011 PAGE_COPY /* private -wr */
+#define __P100 PAGE_READONLY_EXEC /* private x-- */
+#define __P101 PAGE_READONLY_EXEC /* private x-r */
+#define __P110 PAGE_COPY_EXEC /* private xw- */
+#define __P111 PAGE_COPY_EXEC /* private xwr */
+
+#define __S000 PAGE_NONE /* shared --- */
+#define __S001 PAGE_READONLY /* shared --r */
+#define __S010 PAGE_SHARED /* shared -w- */
+#define __S011 PAGE_SHARED /* shared -wr */
+#define __S100 PAGE_READONLY_EXEC /* shared x-- */
+#define __S101 PAGE_READONLY_EXEC /* shared x-r */
+#define __S110 PAGE_SHARED_EXEC /* shared xw- */
+#define __S111 PAGE_SHARED_EXEC /* shared xwr */
#ifndef __ASSEMBLY__
#define pmd_page(pmd) virt_to_page(pmd_val(pmd))
/*
- * The following only work if pte_present() is true.
+ * pte status.
*/
-#define pte_none(pte) (!(pte_val(pte) ^ _PAGE_USER))
-#define pte_present(pte) (pte_val(pte) & _PAGE_VALID)
+#define pte_none(pte) (pte_val(pte) == _PAGE_INVALID)
+#define pte_present(pte) \
+ (((pte_val(pte) & _PAGE_CA_MASK) != _PAGE_INVALID) \
+ || ((pte_val(pte) & _PAGE_PROTNONE) == _PAGE_PROTNONE))
#define pte_clear(mm,addr,ptep) \
- do { update_pte(ptep, __pte(_PAGE_USER)); } while(0)
+ do { update_pte(ptep, __pte(_PAGE_INVALID)); } while(0)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_present(pmd) (pmd_val(pmd) & PAGE_MASK)
-#define pmd_clear(pmdp) do { set_pmd(pmdp, __pmd(0)); } while (0)
#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
+#define pmd_clear(pmdp) do { set_pmd(pmdp, __pmd(0)); } while (0)
-/* Note: We use the _PAGE_USER bit to indicate write-protect kernel memory */
-
-static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
+static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITABLE; }
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
-static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~(_PAGE_RW | _PAGE_WRENABLE); return pte; }
-static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
-static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
-static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_RW; return pte; }
+static inline pte_t pte_wrprotect(pte_t pte)
+ { pte_val(pte) &= ~(_PAGE_WRITABLE | _PAGE_HW_WRITE); return pte; }
+static inline pte_t pte_mkclean(pte_t pte)
+ { pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HW_WRITE); return pte; }
+static inline pte_t pte_mkold(pte_t pte)
+ { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mkdirty(pte_t pte)
+ { pte_val(pte) |= _PAGE_DIRTY; return pte; }
+static inline pte_t pte_mkyoung(pte_t pte)
+ { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mkwrite(pte_t pte)
+ { pte_val(pte) |= _PAGE_WRITABLE; return pte; }
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*/
+
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define pte_same(a,b) (pte_val(a) == pte_val(b))
#define pte_page(x) pfn_to_page(pte_pfn(x))
{
*ptep = pteval;
#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
- __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (ptep));
+ __asm__ __volatile__ ("dhwb %0, 0" :: "a" (ptep));
#endif
+
}
struct mm_struct;
set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
*pmdp = pmdval;
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
- __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (pmdp));
-#endif
}
struct vm_area_struct;
/*
* Encode and decode a swap entry.
- * Each PTE in a process VM's page table is either:
- * "present" -- valid and not swapped out, protection bits are meaningful;
- * "not present" -- which further subdivides in these two cases:
- * "none" -- no mapping at all; identified by pte_none(), set by pte_clear(
- * "swapped out" -- the page is swapped out, and the SWP macros below
- * are used to store swap file info in the PTE itself.
*
- * In the Xtensa processor MMU, any PTE entries in user space (or anywhere
- * in virtual memory that can map differently across address spaces)
- * must have a correct ring value that represents the RASID field that
- * is changed when switching address spaces. Eg. such PTE entries cannot
- * be set to ring zero, because that can cause a (global) kernel ASID
- * entry to be created in the TLBs (even with invalid cache attribute),
- * potentially causing a multihit exception when going back to another
- * address space that mapped the same virtual address at another ring.
- *
- * SO: we avoid using ring bits (_PAGE_RING_MASK) in "not present" PTEs.
- * We also avoid using the _PAGE_VALID bit which must be zero for non-present
- * pages.
- *
- * We end up with the following available bits: 1..3 and 7..31.
- * We don't bother with 1..3 for now (we can use them later if needed),
- * and chose to allocate 6 bits for SWP_TYPE and the remaining 19 bits
- * for SWP_OFFSET. At least 5 bits are needed for SWP_TYPE, because it
- * is currently implemented as an index into swap_info[MAX_SWAPFILES]
- * and MAX_SWAPFILES is currently defined as 32 in <linux/swap.h>.
- * However, for some reason all other architectures in the 2.4 kernel
- * reserve either 6, 7, or 8 bits so I'll not detract from that for now. :)
- * SWP_OFFSET is an offset into the swap file in page-size units, so
- * with 4 kB pages, 19 bits supports a maximum swap file size of 2 GB.
- *
- * FIXME: 2 GB isn't very big. Other bits can be used to allow
- * larger swap sizes. In the meantime, it appears relatively easy to get
- * around the 2 GB limitation by simply using multiple swap files.
+ * Format of swap pte:
+ * bit 0 MBZ
+ * bit 1 page-file (must be zero)
+ * bits 2 - 3 page hw access mode (must be 11: _PAGE_INVALID)
+ * bits 4 - 5 ring protection (must be 01: _PAGE_USER)
+ * bits 6 - 10 swap type (5 bits -> 32 types)
+ * bits 11 - 31 swap offset / PAGE_SIZE (21 bits -> 8GB)
+
+ * Format of file pte:
+ * bit 0 MBZ
+ * bit 1 page-file (must be one: _PAGE_FILE)
+ * bits 2 - 3 page hw access mode (must be 11: _PAGE_INVALID)
+ * bits 4 - 5 ring protection (must be 01: _PAGE_USER)
+ * bits 6 - 31 file offset / PAGE_SIZE
*/
-#define __swp_type(entry) (((entry).val >> 7) & 0x3f)
-#define __swp_offset(entry) ((entry).val >> 13)
-#define __swp_entry(type,offs) ((swp_entry_t) {((type) << 7) | ((offs) << 13)})
+#define __swp_type(entry) (((entry).val >> 6) & 0x1f)
+#define __swp_offset(entry) ((entry).val >> 11)
+#define __swp_entry(type,offs) \
+ ((swp_entry_t) {((type) << 6) | ((offs) << 11) | _PAGE_INVALID})
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define PTE_FILE_MAX_BITS 29
-#define pte_to_pgoff(pte) (pte_val(pte) >> 3)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 3) | _PAGE_FILE })
-
+#define PTE_FILE_MAX_BITS 28
+#define pte_to_pgoff(pte) (pte_val(pte) >> 4)
+#define pgoff_to_pte(off) \
+ ((pte_t) { ((off) << 4) | _PAGE_INVALID | _PAGE_FILE })
#endif /* !defined (__ASSEMBLY__) */
* remap a physical page `pfn' of size `size' with page protection `prot'
* into virtual address `from'
*/
+
#define io_remap_pfn_range(vma,from,pfn,size,prot) \
remap_pfn_range(vma, from, pfn, size, prot)
-/* No page table caches to init */
-
-#define pgtable_cache_init() do { } while (0)
+extern void pgtable_cache_init(void);
typedef pte_t *pte_addr_t;
* the 1 GB requirement applies to the stack as well.
*/
-#define TASK_SIZE 0x40000000
+#define TASK_SIZE __XTENSA_UL_CONST(0x40000000)
/*
* General exception cause assigned to debug exceptions. Debug exceptions go
+/*
+ * include/asm-xtensa/syscall.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ */
+
struct pt_regs;
struct sigaction;
asmlinkage long xtensa_execve(char*, char**, char**, struct pt_regs*);
const struct sigaction __user *,
struct sigaction __user *,
size_t);
-asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg);
+asmlinkage long xtensa_shmat(int, char __user *, int);
+asmlinkage long xtensa_fadvise64_64(int, int,
+ unsigned long long, unsigned long long);
+
+/* Should probably move to linux/syscalls.h */
+struct pollfd;
+asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,
+ fd_set __user *exp, struct timespec __user *tsp, void __user *sig);
+asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
+ struct timespec __user *tsp, const sigset_t __user *sigmask,
+ size_t sigsetsize);
+
+
#define HUPCL 0002000
#define CLOCAL 0004000
#define CBAUDEX 0010000
+#define BOTHER 0010000
#define B57600 0010001
#define B115200 0010002
#define B230400 0010003
#define B3000000 0010015
#define B3500000 0010016
#define B4000000 0010017
-#define CIBAUD 002003600000 /* input baud rate (not used) */
+#define CIBAUD 002003600000 /* input baud rate */
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
+#define IBSHIFT 16 /* Shift from CBAUD to CIBAUD */
+
/* c_lflag bits */
#define ISIG 0000001
copy_to_user((termio)->c_cc, (termios)->c_cc, NCC); \
})
-#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
-#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
+#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios2))
+#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios2))
+#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
+#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
#endif /* __KERNEL__ */
extern unsigned long ccount_per_jiffy;
extern unsigned long ccount_nsec;
#define CCOUNT_PER_JIFFY ccount_per_jiffy
-#define CCOUNT_NSEC ccount_nsec
+#define NSEC_PER_CCOUNT ccount_nsec
#else
#define CCOUNT_PER_JIFFY (CONFIG_XTENSA_CPU_CLOCK*(1000000UL/HZ))
-#define CCOUNT_NSEC (1000000000UL / CONFIG_XTENSA_CPU_CLOCK)
+#define NSEC_PER_CCOUNT (1000UL / CONFIG_XTENSA_CPU_CLOCK)
#endif
#ifndef _XTENSA_TLB_H
#define _XTENSA_TLB_H
-#define tlb_start_vma(tlb,vma) do { } while (0)
-#define tlb_end_vma(tlb,vma) do { } while (0)
-#define __tlb_remove_tlb_entry(tlb,pte,addr) do { } while (0)
+#include <asm/cache.h>
+#include <asm/page.h>
+
+#if (DCACHE_WAY_SIZE <= PAGE_SIZE)
+
+/* Note, read http://lkml.org/lkml/2004/1/15/6 */
+
+# define tlb_start_vma(tlb,vma) do { } while (0)
+# define tlb_end_vma(tlb,vma) do { } while (0)
+
+#else
+# define tlb_start_vma(tlb, vma) \
+ do { \
+ if (!tlb->fullmm) \
+ flush_cache_range(vma, vma->vm_start, vma->vm_end); \
+ } while(0)
+
+# define tlb_end_vma(tlb, vma) \
+ do { \
+ if (!tlb->fullmm) \
+ flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
+ } while(0)
+
+#endif
+
+#define __tlb_remove_tlb_entry(tlb,pte,addr) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
-#include <asm/page.h>
#define __pte_free_tlb(tlb,pte) pte_free(pte)
#ifndef _XTENSA_TYPES_H
#define _XTENSA_TYPES_H
+
+#ifdef __ASSEMBLY__
+# define __XTENSA_UL(x) (x)
+# define __XTENSA_UL_CONST(x) x
+#else
+# define __XTENSA_UL(x) ((unsigned long)(x))
+# define __XTENSA_UL_CONST(x) x##UL
+#endif
+
#ifndef __ASSEMBLY__
typedef unsigned short umode_t;
#define __NR_available62 62
__SYSCALL( 62, sys_ni_syscall, 0)
#define __NR_fadvise64_64 63
-__SYSCALL( 63, sys_fadvise64_64, 6)
+__SYSCALL( 63, xtensa_fadvise64_64, 6)
#define __NR_utime 64 /* glibc 2.3.3 ?? */
__SYSCALL( 64, sys_utime, 2)
#define __NR_utimes 65
__SYSCALL(149, sys_getpgid, 1)
#define __NR_getppid 150
__SYSCALL(150, sys_getppid, 0)
-#define __NR_available151 151
-__SYSCALL(151, sys_ni_syscall, 0)
+#define __NR_getpgrp 151
+__SYSCALL(151, sys_getpgrp, 0)
#define __NR_reserved152 152 /* set_thread_area */
__SYSCALL(152, sys_ni_syscall, 0)
#define __NR_available259 259
__SYSCALL(259, sys_ni_syscall, 0)
-#define __NR_syscall_count 261
+
+#define __NR_readahead 260
+__SYSCALL(260, sys_readahead, 5)
+#define __NR_remap_file_pages 261
+__SYSCALL(261, sys_remap_file_pages, 5)
+#define __NR_migrate_pages 262
+__SYSCALL(262, sys_migrate_pages, 0)
+#define __NR_mbind 263
+__SYSCALL(263, sys_mbind, 6)
+#define __NR_get_mempolicy 264
+__SYSCALL(264, sys_get_mempolicy, 5)
+#define __NR_set_mempolicy 265
+__SYSCALL(265, sys_set_mempolicy, 3)
+#define __NR_unshare 266
+__SYSCALL(266, sys_unshare, 1)
+#define __NR_move_pages 267
+__SYSCALL(267, sys_move_pages, 0)
+#define __NR_splice 268
+__SYSCALL(268, sys_splice, 0)
+#define __NR_tee 269
+__SYSCALL(269, sys_tee, 0)
+#define __NR_vmsplice 270
+__SYSCALL(270, sys_vmsplice, 0)
+#define __NR_available271 271
+__SYSCALL(271, sys_ni_syscall, 0)
+
+#define __NR_pselect6 272
+__SYSCALL(272, sys_pselect6, 0)
+#define __NR_ppoll 273
+__SYSCALL(273, sys_ppoll, 0)
+#define __NR_epoll_pwait 274
+__SYSCALL(274, sys_epoll_pwait, 0)
+#define __NR_available275 275
+__SYSCALL(275, sys_ni_syscall, 0)
+
+#define __NR_inotify_init 276
+__SYSCALL(276, sys_inotify_init, 0)
+#define __NR_inotify_add_watch 277
+__SYSCALL(277, sys_inotify_add_watch, 3)
+#define __NR_inotify_rm_watch 278
+__SYSCALL(278, sys_inotify_rm_watch, 2)
+#define __NR_available279 279
+__SYSCALL(279, sys_ni_syscall, 0)
+
+#define __NR_getcpu 280
+__SYSCALL(280, sys_getcpu, 0)
+#define __NR_kexec_load 281
+__SYSCALL(281, sys_ni_syscall, 0)
+
+#define __NR_ioprio_set 282
+__SYSCALL(282, sys_ioprio_set, 2)
+#define __NR_ioprio_get 283
+__SYSCALL(283, sys_ioprio_get, 3)
+
+#define __NR_set_robust_list 284
+__SYSCALL(284, sys_set_robust_list, 3)
+#define __NR_get_robust_list 285
+__SYSCALL(285, sys_get_robust_list, 3)
+#define __NR_reserved286 286 /* sync_file_rangeX */
+__SYSCALL(286, sys_ni_syscall, 3)
+#define __NR_available287 287
+__SYSCALL(287, sys_faccessat, 0)
+
+/* Relative File Operations */
+
+#define __NR_openat 288
+__SYSCALL(288, sys_openat, 4)
+#define __NR_mkdirat 289
+__SYSCALL(289, sys_mkdirat, 3)
+#define __NR_mknodat 290
+__SYSCALL(290, sys_mknodat, 4)
+#define __NR_unlinkat 291
+__SYSCALL(291, sys_unlinkat, 3)
+#define __NR_renameat 292
+__SYSCALL(292, sys_renameat, 4)
+#define __NR_linkat 293
+__SYSCALL(293, sys_linkat, 5)
+#define __NR_symlinkat 294
+__SYSCALL(294, sys_symlinkat, 3)
+#define __NR_readlinkat 295
+__SYSCALL(295, sys_readlinkat, 4)
+#define __NR_utimensat 296
+__SYSCALL(296, sys_utimensat, 0)
+#define __NR_fchownat 297
+__SYSCALL(297, sys_fchownat, 5)
+#define __NR_futimesat 298
+__SYSCALL(298, sys_futimesat, 4)
+#define __NR_fstatat64 299
+__SYSCALL(299, sys_fstatat64, 0)
+#define __NR_fchmodat 300
+__SYSCALL(300, sys_fchmodat, 4)
+#define __NR_faccessat 301
+__SYSCALL(301, sys_faccessat, 4)
+#define __NR_available302 302
+__SYSCALL(302, sys_ni_syscall, 0)
+#define __NR_available303 303
+__SYSCALL(303, sys_ni_syscall, 0)
+
+#define __NR_signalfd 304
+__SYSCALL(304, sys_signalfd, 3)
+#define __NR_timerfd 305
+__SYSCALL(305, sys_timerfd, 4)
+#define __NR_eventfd 306
+__SYSCALL(306, sys_eventfd, 1)
+
+#define __NR_syscall_count 307
/*
* sysxtensa syscall handler
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_GETPGRP
-#endif /* __KERNEL__ */
+/*
+ * Ignore legacy system calls in the checksyscalls.sh script
+ */
-#endif /* _XTENSA_UNISTD_H */
+#define __IGNORE_fork /* use clone */
+#define __IGNORE_time
+#define __IGNORE_alarm /* use setitimer */
+#define __IGNORE_pause
+#define __IGNORE_mmap /* use mmap2 */
+#define __IGNORE_vfork /* use clone */
+#define __IGNORE_fadvise64 /* use fadvise64_64 */
+#endif /* __KERNEL__ */
+#endif /* _XTENSA_UNISTD_H */
projects / mirror_ubuntu-artful-kernel.git / commitdiff